Pair fluctuation induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling
Superconductivity
2009-10-31 v2
Abstract
One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak coupling regime using the non-selfconsistent T-matrix approximation. The corresponding equations are evaluated numerically directly on the real frequency axis. For temperatures sufficiently close to the superconducting transition temperature a pseudogap in the one-particle spectral function is observed, which can be assigned to the increasing importance of pair fluctuations.
Keywords
Cite
@article{arxiv.cond-mat/0011500,
title = {Pair fluctuation induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling},
author = {Daniel Rohe and Walter Metzner},
journal= {arXiv preprint arXiv:cond-mat/0011500},
year = {2009}
}
Comments
22 pages, 13 figures